I have recently received my oil catch can, but one thing that seems very aparent is that it wont catch fine particles. What do you guys think about putting a thin foam coating inside the catch can. What gave me this idea is because on many air water separators they use just simple foam. About the consistency of microphone foam.

 

Why do you think it won't catch fine particles? The only think it should be filtering is oil vapors. Some people have stuffed their cans full of steel wool. Oil is not like dust, in that once it hit a suface(like the steel wool) it will cling to it.